REVERSI

You are the dark stones, AI is the light stones. Click an empty square to place your stone. You must outflank at least one opponent stone -- that means your new stone and an existing stone of yours must sandwich a line of opponent stones (horizontally, vertically, or diagonally). All sandwiched stones flip to your color. If you cannot make a valid move, your turn is skipped. The game ends when neither player can move. Most stones wins. Green dots show your valid moves. A red dot marks the opponent's last move.